Method of making seamless wire.



T. F. GARLISLEL METHOD OF MAKING SEAMLESS WIRE.

APPLICATION FILED MARJS, I910.

978,846, Patented Dec. 20, 1910. 5 A

Wmvfisszs [IVVENTOR z a ATTORNEY UNITED STATE PATENT OFFICE.

THOMAS F. CABLISLE, OE PROVIDEIICE, RHODE ISLAND, ASSIGNOR TO THE IMPROVED SEAMLESS WIRE COMPANY, .A CORPORATION OF RHODE ISLAND.

Specification of Letters Patent.

Patented Dec. 20, 1910.

Application filed March 16, 1910. Serial No. 549,603.

To all whom it concern:

, Be it known that I, THOMAS F. CARLIsLn, a citizen of the United States, residing at Providence, in the county of Providence and The chain manufacturer cuts into suitable lengths'a seamless precious metal plated wire having throughout its length a centralplug or'core ofsolden] Each'lengthis'bent into circular form and the abutting ends are heated to flow thessolder overthefaces to'be united. It hasbeen; difiicult, .'and in some cases impossible, to properly unite the-faces because of the'la'ck ofcontinui-ty of the solder plug which is transversely fractured'during the reducing step. inthe formation of the wire. During the elongation of the wire ingot these fractures increase leaving. solderless intervals which, when they occur at the end of a link length, makes it impossible to perform the soldering operation. Furthermore only a small areaupon the end faces of a link or wire length is available for the solder flow, and sucharea asexists is a comparatively narrow rim near the periphery of thelink'face which invites an excessive flow of solder defacing the exteriorf of the link. Neither is there any substantial holding area at the centerof the joint which is an important defect of'strength.

It is the purpose of my invention to produce a, wire available for use in chain links and. other articles of jewelry which is free from the defects above enumerated; and my invention consists in the novel process hereinafter described in conjunction with the accompanying; drawings which constitute a part of thislspecification.

In the-drawings Figure 1 is a perspective view of. a plated tube, F ig. 2, a longitudinal section of the same, Fi ,3, a like section of another form of plate tube, Fig; 4, a perspective view of another form of solder tube,

Fig. 5, a like view of another form of solder tube', Fig. 6', similar view of a core, Fi 7, a

perspective view of a complete ingot, ig. 8, a longitudinal section ofthe same, Fig. 9, a

side elevation of a length ofcompleted wire,

fntlli Fig'. 10 a detail view enlarged of a chain In forming my wire I employ a tube A comprising a hollow member or body B of brass or other base metal, covered with a plating skin or shell C of precious metal. The shell'may be simple, as shown in Figs. 1 and. 2, or compound, as "shown at C in Fig. 3, and may be united to the member B in. any usual' convenient manner, as for instance, as shownin United States' Patents No. 294,722, or No. 445,814, or, when the compound shell is employed, as shown in No. 618,165. It will, however, be noted that in my present'structure the inner member B -is -hollow or tubular rather than solid as shown in the patents cited. The interior surface]; of the plated tube A is properly fluxed I and receives a tube D of solder which is also fluxed upon both its faces before insertion into the plated tube -A. The solder tube may be seamless, as shown in Fig. :4, or be longitudinally; slit throughout its length as atd, as shown in Fig. 5. The latter form is ;preferable in use. A rod orcore E of brass or other base non-fusible'nietal, is fluxed and inserted tightly into the tube D. The describedparts thusassembled constitute the ingot, as shown in Figs. 7 and ,8, which, is re need to the desired diameter of wire, shown in Fig. 9, by swaging machines or v rollsin the usual manner. This'wire is used by 'the jeweler by cutting the same into lengths or blanks and bending the latter into links similar to that marked G in Fig. 10.

It should be noted that during the reduction of'the ingot the hard core E in conjunction with the surface 7) of the plated tube, guides and supports the solder tube so as to prevent fracture of the latter. Furthermore when the abutting ends of a link are heated to flow the solder, the end faces of the core E furnish an auxiliary area of hard metal at the very center of the joint which strengthens the union at the joint. I

It will be noted that the advantageous results herein sought are attained essentially by the non-fusing of the solder tube D prior to the reduction of the assembled parts intowire.

. What I cla1m.1s,--

1 1. A process for forming solder" .illedwire 2 consisting in inserting into a cylindrical seamless plated body a non-fusible core surrounded by an independent solder tube, and reducing the diameter of the assembled parts.

' 2. A process for forming solder filled Wire consisting in first, plating a base metal tube with a precious metal to form an ingot body, next. insertin a solid core and an intermediate tube of solder Within the body, and finally reducing the diameter of the assembled parts Without fusing of the solder tube.

3. A process for forming solder filled' Wire, consisting in uniting by fusion a plating l shell to a base metal tube, fluxing a base metal core and a solder tube, inserting the core within the solder tube, introducing the 1 core and solder tube into the base metal tube, and reducing the assembled parts to Wire Without the fusion of the solder tube.

In testimony whereof I have affixed my signature in presence of two Witnesses.

THOMAS F. CARLISLE. WVitnesses:

VILLIAM H. POLK, JAMES M. TISDALE. 

